DECLARE @t TABLE(Item varchar(10),Color varchar(10),Quantity int)
INSERT @t SELECT 'Table','Blue',124
UNION ALL SELECT 'Table','Red', -23
UNION ALL SELECT 'Chair','Blue',101
UNION ALL SELECT 'Chair','Red', -90

--统计
SELECT Item,Color,Quantity=SUM(Quantity)
FROM @t
GROUP BY Item,Color WITH ROLLUP
/*--结果
Item Color Quantity
---------- ---------- -----------
Chair Blue 101
Chair Red -90
Chair NULL 11
Table Blue 124
Table Red -23
Table NULL 101
NULL NULL 112
--*/

绝对经典！！！ 只写了部分好动西还在里面!!